Nakamichi Dragon cassette deck

The ultimate innovation in cassette technology - precise, fully automatic playback head azimuth adjustment. Optimum reproduction quality in both forward and reverse playback modes.

In a slightly different genere than the luxurious 1000ZXL, the Dragon is undoubtedly the finest cassette deck available. It represents the culmination of Nakamichi's vast technical resources and experience, retaining the basic uncompromising Nakamichi standards of performance through use of such innovations as an Asymmetrical, Dual-Capstan Double-Direct-Drive Transport, a Discrete Three-Head configuration, very high quality record/playback amplifier circuitry and, of particular interest to perfectionists, our unique NAAC (Nakamichi Auto Azimuth Correction) for the ultimate in playback performance from both sides on any tape.

 

Proper azimuth alignment is one of the most important factors in achieving the best possible cassette reproduction quality. For this reason, several Nakamichi cassette decks offer either automatic or manual adjustment of record head azimuth. Ideally, however, playback head azimuth should be adjustable so that even tapes recorded on other decks will be reproduced with the recorded frequency response and sound quality fully intact. Commercially available music tape, tapes borrowed from a friend, tapes in which the shell has warped slightly (a common occurrence) - all actually require some degree of playback head azimuth alignment to provide the best possible reproduction quality. Further, inaccuracies in cassette shell symmetry result in completely different azimuth alignment requirements in forward and reverse on auto-revers decks, often causing a significant variation in sound quality. All these points and problems LED Nakamichi to the development of the world's first fully automatic playback head azimuth alignment system NAAC, and its incorporation into this fine deck.

The Dragon's unique double direct drive system employs two Nakamichi quartz PLL servo Super Linear Torque DD motors (one for each capstan) so that wow and flutter are essentially eliminated while maintaining perfect transport stability in both forward and reverse directions. Auto reverse operation has been made available only in the playback mode so that the superb performance of the Discrete Three-head System is not compromised. Of course, full provision is made for left and right channel bias and record/playback level adjustment. All the Dragon's performance features also mean that the built-in Dolby C-type noise reduction system operates under ideal conditions for the best performance. Likewise, heads, mechanism and amplifiers are all the best available, as are features such as the microcomputer-controlled, real-time mechanism control system proven in other Nakamichi decks. Convenience features include Auto Rec Pause, where the deck automatically enters the pause mode during recording if a blank interval of 30 seconds or longer is detected in the source, switchable MPX and subsonic filters, easy cueing, and a dual-speed auto fader function, for customized recording with professional fade-in/fade-out results.

 

Specifications

System Configuration:  4-track, 2-channel stereo

Heads:  3; erase head x 1; record head x 1; 4-track, 4-channel playback head x 1

Motors Transport :

 Two Quartz PLL DC brushless, slotless coreless Super Linear  Torque DD Motor for Capstan drive

 one DC Motor for reel drive

Auto Azimuth Correction :  DC Motor

Mechanism :  DC Motor

Tape Speed: 1-7/8 ips (4,8 cm/sec)

Wow and Flutter: less than 0,019% WTD RMS; less than ±0,04%  WTD Peak

Frequency Response:

20 Hz - 22,000 Hz ±3 dB (recording level -20 dB , ZX tape)

20 Hz - 21,000 Hz ±3 dB (recording level -20 dB , SX, EX II tape)

Signal-to-Noise Ratio:

Dolby C-Type NR On [70 µs, ZX tape] :  better than 72 dB (400 Hz, 3% T.H.D., IHF A-WTD RMS)

Dolby B-Type NR On [70 µs, ZX tape] :  better than 66 dB (400 Hz, 3% T.H.D., IHF A-WTD RMS)

Total Harmonic Distortion :  less than 0,8% (400 Hz , 0 dB, ZX tape)

Less than 1% (400 Hz, 0 dB, SX, EX II tape)

Erasure:  better than 60 dB (100 Hz, 0 dB)

Separation:  better than 37 dB (1 kHz, 0 dB)

Crosstalk:  better than 60 dB (1 kHz, 0 dB)

Bias Frequency:  105 kHz

Input Line Sensitivity/Impedance :  50 mV/50 k Ω

Output Level/Impedance

Line  :  1 V (400 Hz, 0 dB, output level control at max.)/ 2,2 k Ω

Headphone :  45 mW (400 Hz, 0 dB, output level control at max.)/ 8 Ω

Black Box Series DC Output:  ±10 V, 125 mA max.

Power Requirements:  100,120, 220, 240 V AC 50/60 Hz

Power Consumption:  45 W max.

Dimensions (W x H x D):  450 x 135 x 300 mm (17-3/4" x 5-5/16" x 11-13/16"

Weight:  9,5 kg (21 lbs)

 

Vandersteen Model 3 loudspeaker

The Aligned Dynamic Design

The Model Three uses the proven Vandersteen Aligned Dynamic Design to optimize the dispersion and transient accuracy of the drivers while maintaining the input signal's time and phase integrity. The drivers, their positioning and their associated minimum baffles were developed with the aid of FFT computer analysis to minimise diffraction, cone break-up, multi-driver interference and out-of-band phase irregularities. The construction, alignment and positioning of the driven allow a point-source wave front and maximize the phase coherence of the loudspeaker at the listening position.

The Aligned Dynamic Design is used for the Model Three due to its many potential advantages:

Precise, more dimensional imaging and a wider listening area

A greater flexibility of placement options within the listening room and better "real word" transient response due to the lack of out-of-phase rear-wave cancellations.

A high level of genuine transparency and detail typical of planar speakers without the dege-clamping distortion that exist in all rectangular electrostatic and planar panels

Increased efficiency and improved dynamic range.

 

The components used in the Model Three combine durability and strength with innovative design and construction. The metal-alloy dome-tweeter is a dual-chamber design to improve range and linearity. It is critically damped to extend the high frequencies past audibility without the excessive ringing associated with open or underdamped metal dome tweeters. The alloy used for the dome was chosen for its superior strength and resistance to break-up compared to common dome materials.

With the application of years of experience in FFT computer analysis and research into the negative effects of diffraction, a unique, proprietary midrange driver has been developed that outperforms previous designs in several significant parameters. In conventional cone midrange, the acoustic energy from the back of the cone immediately strikes the front of the driver's magnet assembly and is reflected back through the cone and into the listening room.

This distorted secondary signal created by the internal diffraction smears the sound of the driver and inhibits true transparency. The frontal area of the magnet assembly on the Model Three midrange has been minimized through the use of advanced materials and construction techniques to reduce internal diffraction and the resultant distortion to inaudible levels. With the elimination of this distortion, the sound of the Model Three is cohesive and smooth with a level of inner resolution unequalled by other dynamic loudspeakers.

The active acoustic coupler and woofer use costly cast-metal baskets rather than more common stamped baskets. The cast-metal baskets inherent rigidity and superior vibration control increase cone movement accuracy and reduce sympathetic resonances for cleaner and more natural sound. Filled polycones are used on the woofer and midrange to insure higher internal stiffened and greater neutrality than woven plastic or treated paper cones. The stiff, low weight polycones resist flexing under all drive conditions for lower distortion and increased detail.

The dual-spider active acoustic coupler accurately complements the woofer to reduce box loss, thermodynamic loss and active/passive transfer nonlinearities. This novel Electro-Mechanically Optimized Woofer System provides powerful, detailed and extended bass response as the Model Three operates much more closely to the ideal than any conventional ported or passive design.

 

The crossover in the Model Three is comprised of transient-perfect, first-order networks designed to preserve the phase integrity of the music. It is compensated to allow the drivers to operate in absolute phase with each other for more precise and stable imaging than conventional multi-way speakers using out-of-phase drivers. The crossover's computer grade components, including low impedance air-core inductors and high-quality film capacitors in the signal path, are hand soldered on a double-sided, plated-through PC board tested to insure less than 0,1 dB deviation from a reference circuit. Custom 6N wire with polypropylene dielectric is used for internal wiring to maximize signal transfer.

The crossover is engineered for bi0wiring with a stereo amplifier or two monoblock amplifiers or passive vertical bi-amplification with two identical stereo amplifiers or four identical monoblock amplifiers. Inputs are heavy-duty screw terminals.

 

The baffles holding the drivers of the Model Three are as small as possible to eliminate virtually all of the early reflections that affect dynamic speakers with conventional flat or low diffraction baffles. Reducing both early reflections and edge diffraction improves the imaging and enhances the openness and transparency of the speaker.

The enclosure of the Model Three is constructed of MDF, a wood product far more dense and acoustically inhert than conventional particle-board. Broad-spectrum, low -Q resonances are controlled so as to cancel rather than become additive.

 

Specifications

Impedance:  6 Ω  nominal; 4 Ω  minimum

Efficiency:  89 dB with 1 watt of pink noise input at 1 meter on axis

Recommended Amplification:  100 to 200 watts per channel into 8 Ω .
The amplifier must be stable into a 4 Ω  load.

Frequency Response:

26 Hz to 30,000 Hz ±3 dB

30 Hz to 22,000 Hz ±1,5 dB by FFT step function

Dispersion:  26 Hz to 17 kHz ±3 dB 30degrees off axis

Crossover Frequencies:  600 Hz and 5 kHz First-order, 6 dB per octave

Input Connections:  2 pair of heavy duty screw terminals

Recommended Placement:  12-inches or more from the rear wall,

Cabinet Finish:  Hand-matched and finished natural oiled wood veneers

Dimensions (H x W x D):  48" x 16" x 10,25"

Weight:  88 lbs net

 

JBL 4430 monitor loudspeakers

Developed to meet the challenge of digital and advanced analog recording technology, the JBL Model 4430 {and Model 4435} represent a significant new approach to two-way studio monitor design. The incorporation of the unique JBL Bi-Radial ™ horn in a monitor loudspeaker provides constant vertical and horizontal polar coverage, control of the reverberant field, flat power response, image stability, and coherent sound. The two models also feature improvements in compression driver, low frequency transducer, and dividing network technology. Both systems exhibit the traditional )BL attributes of wide bandwidth, smooth frequency response, high efficiency, wide dynamic range, and exceptional reliability.

The practical benefits of the Bi-Radial monitors include stable stereo imaging that remains fixed over a wide range of horizontal positions, the result of unusually smooth off-axis response. The design allows considerable latitude in physical placement. The wide vertical response, identical to the horizontal, includes both standing and seated listeners within the coverage angle, even in proximity to the monitors.

 

THE JBL BI-RADIAL ™ HORN

The Models 4430 offer performance levels normally achieved by three- and four-way systems. The key to this performance is the JBL Bi-Radial ™ horn 1 and its integration in a monitor design.

Most horn designs compensate for the failing power response of the compression driver with directivity that increases with frequency. This provides flat axial response, but power response that typically falls by 6 dB per octave from as low as 3 kHz. The resulting decrease in coverage angle (as the frequency increases) gives generally poor control of the reverberant field and (in two-way designs) is not well matched to the coverage angle of the low frequency driver at the crossover frequency. By contrast, the JBL Bi-Radial ™ horn provides constant coverage over its operating bandwidth. Both on-axis and off-axis pressure response are flat, and the vertical coverage angle is identical to the horizontal. This angle is wide, 100° x 100°, but very tightly controlled, and it matches the coverage angle of the low frequency driver at the crossover frequency. Additionally, the horn's rapid flare rate reduces second harmonic distortion, and its reduced depth puts its driver in the same acoustic plane as the low frequency driver. The Bi-Radial ™ monitors present a coherent sound source, with extremely stable stereo imaging over a wide variety of listening positions. The monitors offer a high degree of placement flexibility, and the listening position can be quite close with no loss of stereo imaging.

Equalization of the 4430  will typically be needed only to correct for inherent room anomalies rather than for monitor response. This is the result of uniform frequency response within the coverage angle. The controlled power and polar response of the JBL Bi-Radial ™ monitors effectively removes them from the variables with which a recording engineer must contend.

 

HIGH FREQUENCY COMPRESSION DRIVER

The Bi-Radial ™ horn is coupled to a compression driver which is crossed over at I 000 Hz. The driver features a titanium diaphragm with a three-dimensional diamond-pattern suspension . Developed by JBL, this diamond surround offers an extended frequency response normally associated with exotic materials while retaining ruggedness and high power capacity. The diaphragm is pneumatically drawn to shape to eliminate stresses that cause fatigue, and a phasing plug of concentric exponential horns eliminates phase cancellation.

 

LOW FREQUENCY

The low frequency loudspeakers used in the Bi-Radial ™l monitors incorporate the latest technology to deliver smooth response, extended bandwidth, and extremely low distortion. The magnetic structures feature JBL's Symmetrical Field Geometry (SFGI design to reduce second harmonic distortion to inconsequential levels. New adhesives technology and coil former construction improve power handling. The coil itself, 100 mm (4 in) in diameter, is fabricated from edge-wound copper ribbon, and operates in a magnetic field having a flux density of 1.2 T (12,000 gauss). The 19 mm(% in) length of the voice coil allows increased linear excursion, and a careful choice of suspension elements helps to completely eliminate dynamic instabilities.

The 4430 differ chiefly in their low frequency capabilities. The 4430 uses a single 380 mm ( 15 in) low frequency driver and is 3 dB down at 32 Hz; it can handle full power input to 27 Hz.  The system is down 3 dB at 27 Hz and will handle full power down to 22 Hz. The systems use similar low frequency drivers, but the cone assemblies.

 

FREQUENCY DIVIDING NETWORK

The frequency dividing network of the Bi-Radial ™ monitors has a crossover frequency of I kHz and a nominal slope of 12 dB per octave. The cut-off slope and shape were chosen to provide the smoothest possible response over the widest bandwidth, restricting any off-axis anomalies to a very narrow portion. JBL has paid considerable attention to both the off-axis response and the total power response, and the network optimizes these parameters. While

the response is smooth at all angles, the flattest response is, by design, on-axis and above. This offers a greater number of listening positions when the system is mounted at or below ear level; for mounting above ear level, the system can be inverted to offer the same advantages. The network also provides equalization of the compression driver. Because the power response of the driver and the Bi-Radial ™ horn is greater in the midrange than at high frequencies, this equalization attenuates the lower end of the compression driver's response, lowering distortion and giving greater dynamic headroom. The equalization is provided in two stages, allowing separate adjustments (via front panel level controls) for the midrange and high frequencies.

A switch located adjacent to the connection terminals allows the monitor to be bi-amplified. A special crossover card is available for the IBL Model 5234A electronic frequency dividing network to provide the appropriate crossover characteristics.

 

Specifications

Frequency Response:  35 Hz - 16,000 kHz ±3 dB

Sensitivity:  93 dB SPL

Efficiency:  1,3%

Dispersion Angle

Horizontal :  100° (+10°; -30°)

Vertical :  100° (+0°, -30°)

Impedance:  8 Ω  nominal

Max. Power Input:  300 W

Continuous Sound Pressure Level:  119 dB

Crossover Frequency:  1,000 Hz

Driver Complement:

Low Frequency :  2235H

Compression Driver :  2425H

Horn :  2344

Enclosure Volume:  0,14m³ (5 cu. Ft)

Resonance Frequency:  34 Hz

Dimensions:  908 x 556 x 400 mm (480 mm deep w/horn)

Weight Net:  26 kg (57 lbs)

 

JBL4425 monitor loudspeakers

Bi-Radial Studio Monitor

The success of the models 4430 and 4435 Bi-radial studio monitor loudspeakers has prompted JBL to introduce a smaller model based on the same principles for use in smaller studios and for a variety of demanding audio production applications.

As in the case of the larger Bi-Radial monitors, the 4425 maintains a 100-degree-by-100-degree coverage pattern from its crossover frequency (1200 Hz) up to 16 kHz. Smooth power response is ensured from the lowest frequencies up to 1200 Hz, and flat power response is maintained above that frequency. At the same time, axial response is remarkably smooth, and the combination of controlled power and axial response ensures that the reflected sound field in the control room will be free of coloration. The model 4425 also addresses the requirement for accurate stereophonic imaging. The mirror imaged pair creates absolutely symmetrical sound fields, and this is the essential requirement for precise imaging. There is no lobbing for normal off-axis listening positions in the horizontal plane, and vertical lobbing is minimized over the preferred listening arc.

The model 4425 can handle program power inputs of 200 watts, more than enough to accommodate the high acoustical levels demanded in critical listening to today's digital recordings.

 

High-Frequency Horn and Driver

The BI-Radial horn used in the model 4425 is a scaled down version of the model 2344 horn used in the 4430 and 4435 monitor loudspeakers. It is made of high-impact structural foam and is acoustically inert. The high-frequency compression driver is a completely new design making use of a computer-machined phasing plug. Tolerances are held to a high degree, and unit-to-unit variation is small. The disphragm assembly is JBL's unique titanium design, with its advantages of extended frequency response relative freedom from mechanical fatigue, and high acoustical output capability. A copper shorting ring plated on the pole piece controls high-frequency impedance and improves high-frequency response.

As is the case with the larger Bi-Radial monitors, the 4425 system maintains precisely aligned phase response over a forty-gegree wide arc in the horizontal plane. The preferred listening arc in the vertical plane is between zero (on-axis) and ten degrees up.

 

Low-Frequency Transducer

A newly designed driver, the model 2214H, is used in the 4425 monitor loudspeaker. This transducer incorporates JBL's symmetrical field geometry (SFG) magnet structure for low distortion. The 76 mm (3-in) voice coil is made of edge-wound copper ribbon wire for highest sensitivity and power handling. The inner suspension of this transducer has been designed to exhibit a progressive increase in restoring force with increasing displacement. This controls dynamic offset for low-frequency, large excursion signals, and results in reduced distortion at low frequencies. A composite coating on the cone optimizes both damping and stiffness, resulting in smoother response and lower distortion.

 

Frequency Dividing Network

In addition to the normal function of frequency division, the network in the 4425 provides power response compensation for the high-frequency drier. Two controls allow the user to contour both mid and high frequencies to match various room characteristics. While the network slopes are 12 dB/octave, the combination of inherent roll-off characteristics in both high- and low-frequency components of the system with the electrical characteristics yields quite rapid transitions in the crossover frequency. Network components are of the most rugged, low-loss type, and high-quality bypass capacitors are placed in parallel with the larger capacitors in the signal path for increased linearity.

 

Specifications

Frequency Response:  40 Hz - 16,000 kHz ±3 dB

Sensitivity:  91 dB SPL

Efficiency:  0,8%

Dispersion Angle

Horizontal :  100° (+10°; -30°)

Vertical :  100° (+0°, -30°)

Impedance:  8 Ω  nominal

Max. Power Input:  200 W

Continuous Sound Pressure Level:  114 dB

Crossover Frequency:  1,200 Hz

Driver Complement:

Low Frequency :  2214H

Compression Driver :  2416H

Horn :  2342

Enclosure Volume:  53,8 l (1,9 cu. Ft.)

Resonance Frequency:  34 Hz

Dimensions:  406 x 635 x 311 mm (375 mm deep w/horn)

Weight Net:  26 kg (57 lbs)

 

Marantz Imperial 8 speakers

A Marantz Imperial 8 speaker can handle 125 watts of integrated program material, but reproduces full realism with a fraction of that.

The Marantz Imperial 8 speaker system is just one of two exciting Marantz floor-standing speaker models.

The step-up model Imperial 9 wit tow 10" woofers is designed for higher power handling capabilities as well as high efficiency and mirror imaging. Both models reflect the kind of technical expertise and engineering excellence that has made Marantz the choice of professionals world-wide. Stop by your local Marantz dealer and see the complete line of floor-standing and book-shelf speaker systems starting as low as $59,95

 

Specifications

Frequency Response:  40 Hz to 18,000 Hz ±2 dB (30 Hz to 20,000 Hz ±5 dB)

Sensitivity:  97 dB (1 Watt/0,5 meter, 1 kHz)

Power Rating:  75 watts Continuous (125 watts Integrated)

Distortion Under:  0,5% 100 dB SPL at 0,5 Meter Avg. Of 50/500/5,000/12,500 Hz 2nd and 3rd Harmonics

Nominal Impedance:  8 Ω

Dimensions (H x W x D):  27" x 18-3/4" x 14-1/2"

Marantz Imperial 9 speakers

Mirror imaging is a unique Marantz attraction not found elsewhere. It is achieved by placing the mid-range and tweeter array of both speaker systems in a mirrored position (either both inside or outside of the speaker). By doing this, the stereo image and overall dispersion is exactly symmetrical giving you the most precise stereo sound and separation possible. The Imperial 9 and 8 may be used in the vertical or horizontal position. And mirror imaging is made easy, since the Imperial 8 is designed with a rotatable array, and the Imperial 9 is designed symmetrically. Mirror imaging, a sound feature that speaks for itself.

 

Specifications

Frequency Response:  35 Hz to 17,000 Hz ±1,5 dB (30 Hz to 18,000 Hz ±3 dB)

Sensitivity:  97 dB (1 Watt/0,5 meter, 1 kHz)

Power Rating:  100 watts Continuous (150 watts Integrated)

Distortion Under:  0,5% 100 dB SPL at 0,5 Meter Avg. Of 50/500/5,000/12,500 Hz 2nd and 3rd Harmonics

Nominal Impedance:  8 Ω

Dimensions (H x W x D):  30-1/2" x 24" x 18"

 

Phase Linear 8000 turntable

Model 8000 Series Two Linear Motor Turntable

No other turntable can match the Phase 8000, because no other turntable has such advanced motors. You can't buy a quieter turntable. Or one with as low wow and flutter. Or one that tracks better.

The Phase 8000's tangential tracking tone arm keeps the stylus in perfect 90° tangent with the grooves. It's the same way the master disc was cut, so the motion of your stylus is identical to the cutterhead stylus. There's absolutely no tracking distortion. No crosstalk. No skating force that can actually re-cut your grooves.

 

New Linear Motor Eliminates Mechanical Linkage

Other manufacturers have tried to move tangential tone arms with worm gears. Belts. Rollers. All with the same sad result; Mechanical connections pass on the noise and vibration of the motor. The Phase 8000 solves this problem with an ingenious Linear Motor. The tone arm base is a permanently magnetized armature that glides along guide bars above electro-magnetic coils. The arm moves by direct induction - not mechanical connection. So there's virtually no noise. Inside the tonearm, an opto-electric detector cell senses the slightest tracking error, and instantly sends correcting signals to keep the arm on track.

 

New Quartz-PLL Direct Drive

Our new slotlles, coreless Stable Hanging Rotor DC motor virtually eliminates "platter wobble". Quick start/stop. Speed deviation is lower than 0,002%.

 

Specifications

Motor and Turntable Section

Drive System:  Direct drive

Motor:  Quartz PLL Hall motor

Platter:  310 mm diam. aluminum die-cast alloy

Inertial Mass:  330 kg-cm² (including platter mat mass)

Speeds:  33-⅓ and 45 rpm

Wow and Flutter: 

DIN :  less than 0,35%

WRMS :  less than 0,025%

Signal-to-Noise Ratio:  better than 78 dB (DIN-B)

Rotational Characteristics

Build-up Time:  with 90° rotation at 33-⅓ rpm

Speed Deviation:  less than 0,002%

Speed vs. Load Characteristics:  stable up to 220 grams drag load

Speed Drift: 

less than 0,00008% per hour at 33-⅓ rpm

Less than 0,00003% per degree of temperature change at 33-⅓

Tonearm

Type:  Linear motor direct-drive static-balance type; linear-tracking arm

Effective Arm Length:  190 mm

Overhang:  0 mm

Usable Cartridge Weight:  4 g to 24 g

Arm Height Adjust Range:  ±3 mm

Headshell Weight:  10,5 g

Semiconductors:  22 ICs; 17 Transistors; 16 Diodes; 3 Hall Elements; 14 LEDs; 5 Photo Transistors; 1 CdS

Miscellaneous

Power Requirements:  110 - 120 V AC, 40/60 Hz

Power Consumption:  35 watts

Dimensions (W x H x D):  494 x 154 x 456 mm (19-7/16" x 6-1/16" x 17-15/16")

Weight:  12 kg (26 lb 8 oz)

 

Yamaha NS-2000 speakers

Natural Sound Speaker System

Pure Carbon Fiber Woofer Cone

Improved Beryllium Midrange and tweeter Domes

Unique In-line Speaker Configuration and Rounded Baffle

Uncompromising Choice of Materials and Construction Throughout

Superbly Crafted Cabinetry

 

The lead in sound-oriented technology that has grown out of a hundred-year tradition has been purposefully expanded in this loudspeaker system. Although Yamaha sound transducers are "digital-proof" thanks to fast and precise signal processing, the NS-2000 system is a resounding testament to the fact that research has not rested in this area either.

 

Further refinement of the exclusive beryllium and carbon fiber technology, weight reduction of the membranes and unrivalled experience in processing valuable woods create the Yamaha system in a class of its own, with which digital progress can be heard.

 

The baffle with rounded edges reduces diffraction and ensures increased stereo definition. The precision housing was developed on the basis of irrefutable computer calculations, coupled with knowledge of sound. The bass membrane made of pure carbon fiber is super light and ultra-stable with a diameter of 33 cm. New beryllium domes have a drastically reduced weight of 0.028 g for the tweeter and 0.5 g for the midrange. The crossover is equipped with coils made of oxygen-free copper wire and large-dimensioned ferrite cores. Level controls for the tweeter and midrange are a matter of course in this class.

 

Specifications

Type:  Fully enclosed bookshelf type

Speakers:

Low Frequency :  JA3301 Woofer carbon diaphragm 330 mm (13") cone

Mid Frequency :  JA0802A Midrange Beryllium diaphragm 88 mm (3-1/2") dome

High Frequency :  JA0526A Tweeter Beryllium diaphragm 30 mm (1-3/16") dome

Nominal Input Power :  125 W

Music Input Power :  250 W

Impedance:  6 Ω

Sound Pressure Level :  90 dB/W/m

Crossover Frequencies:

Low/mid :  500 Hz (12 dB/oct)

Mid-high :  6 kHz (12 dB/oct)

Level Controls:

Mid :  +3 dB (Continuously variable)

High :  +2 dB (Continuously variable)

Enclosure:  Fully enclosed type

Volume :  80 l

Exterior:  American walnut Urethane open pore finish

Dimensions (W x H x D):  440 x 752 x 404 mm (17-5/8" x 29-5/8" x 15-7/8")with grille attached

Weight:  47 kg (103 lbs 6 oz)

 

Beveridge System 4 loudspeakers

The world acclaimed Beveridge Model 2, introduced in 1975, created new demand for a non-amplified, less expensive version of this exclusive speaker system, thus the creation of the System 3. through exposure to System 3, thousands of music lovers around the world were asking for "The Beveridge Sound".

Unfortunately, trained ears cannot always afford the best in sound or a listening studio to house a system of the size and caliber of the Beveridge System 3. the demand was there,  and once again Beveridge answered the call with System 4.

 

System 4 has the same sonic design philosophy as the other components of the Beveridge family. Mainly, flat frequency response, low distortion and more importantly, superb sound reproduction. The realistic essence of the original sound is so exact that there is virtually no difference between reproduced and original sound.

 

The Beveridgw System 4 is able to create a left to right image as well as a life-like front to back image. This three dimensional imaging is the capability that separates this extraordinary speaker system from ordinary speaker systems.

While retaining the superior live sound reproduction of larger Beveridge Systems, the System 4 is substantially smaller in both size and price. At one-third the cost of the original System 2SW-2, the System 4 uses the same electrostatic transducer with a somewhat different dispersion lens. The new 100° dispersion lens affords the owner flexibility in room placement of the speakers. They are just 63" tall and 17,5" in diameter, finished in an elegant architectural tambour designed to compliment any decor.

 

Features

Three foot high, full range electrostatic transducer covers all frequencies above 200 Hz. Electrostatic will not arc; low impedance design minimizes effects of dust, moisture and humidity.

Beveridge patented lens gives the three foot electrostatic transducer a minimum of 100° horizontal dispersion over its entire frequency range and vertical length,

Two 12" drivers in sealed box enclosures cover frequencies from 33 to 200 Hz. The design places woofer on bottom end of the column and ensures bass uniformity throughout a room.

Three way amplification:

Single amplifier

Biamplification using internal Beveridge Passive crossover provided, and

Biamplification using external crossover preferably the Beveridge RM-3 electronic crossover.

Separate fused protection for woofer section, electrostatic section and polarizing voltage section.

Step-up audio transformer custom designed for high permeability and non-saturating cores.

 

Specifications

Frequency Response:  33 Hz - 20,000 Hz ±3 dB of a flat response function of approx. -2 dB per octave, over a horizontal polar pattern of  100°

Total Harmonic Distortion :  1% at 90 dB SPL at 3,3 meters from two units as measured in an average room of 38 sq. Meters

Sound Pressure Level: 106 dB peaks, measured at 1m in a 13" x 26" room.

Woofer:  Q = 0,7 -3 dB "elbow" - 33 Hz

Crossover:  200 Hz , 18 dB/octave passive crossover. Directly by-passable

Impedance:  8 Ω  (can vary between 4 Ω  and 9 Ω )

Amplification Required:  Minimum 50 watts RSM per channel, maximum 300 watts per channel. A stable amp into variable low impedances is necessary, one capable of driving 4 mld load, as well as possessing a damping factor of 20 or over , at 10 kHz

Includes:  Two electronic line sources with built-in sub-woofer system, all step-up transformers, crossovers and polarizing voltage network.

Dimensions:

Diameter :  17,5"high :  63"

Shipping Weight:  200 lbs

Finishes:  Oak or walnut architectural tambour and black foam grill standard. Brushed silver aluminum, rosewood and unfinished birch optional. Export versions available.

 

Nakamichi 580 cassette tape deck

The Crystalloy SuperHead

The 580 uses the record/play SuperHead, originally introduced on the 600 II Cassette Console. The latest version of this head boasts an incredibly narrow 0,9 micron gap. This is narrower than most playback-only heads in three-head designs, and it assures distortion-free playback of the highest frequencies. Yet, during record, the amazing SuperHead magnetizes the tape as if it has a much wider gap, thanks to proprietary manufacturing techniques that virtually eliminate head core saturation. The prof. Is in the 580's remarkable frequency response, there are many three-head cassette decks on the market that cannot come close to matching this performance. The magnetic properties of Crystalloy, furthermore, are far closer to ideal than anything else currently available, including sendust to none, which means distortion is very low. And thanks to special surface "cutouts", the SuperHead lasts a long time. 

 

 

The Direct Flux Erase Head

Mast manufacturers would be very satisfied indeed with a unique device lke the record/play SuperHead. But Nakamichi's in-depth research has shown that even the best of record/play heads can be further improved by providing more complete erasure than normally available. Any noise left on the tape before it reaches the record head can be detrimental to sound quality. The noise is "modulated" by the record head signal, and the recording is thus robbed of clarity. This has been a much neglected area because most designers assume that all an erase head needs do is bring the previously recorded signal down to the level of tape hiss. But in our tests, we found that recordings made on "virgin" or bulk-erased tape sounded better and had less modulation noise than a recording made on normally erased tape. The implication was clear; an erase head should ideally do the same thing as a powerful bulk-eraser.

 

Specifications

Tape Speed:  4,8 cm/s (1-7/8 ips) ±1%

Wow and Flutter:  less than 0,1% WTD Peak 0,05% WTD rms

Frequency Response:  20 - 20,000 Hz ±3 dB (SX, EXII Tapes, -20 dB Rec. Level)

Signal-to-Noise Ratio:  better than 60 dB at 400 Hz, 0 dB, IHF-A WTD rms (Dolby  NR In. SX Tape) better than 63 dB at 400 Hz, 0 dB (SX, EXII Tapes

Total Harmonic Distortion :  less than 1,5% at 400 Hz, 0 dB (SX, EXII Tapes)

Erasure:  better than 60 dB below saturation level at 1 kHz

Separation:  better than 37 dB at 1 kHz, 0 dB

Crosstalk:  better than 60 dB at 1 kHz, 0 dB

Bias Frequency:  105 kHz

Input Sensitivity/Impedance:  50 mV/50 k Ω

Output Level/Impedance:  1 V (400 Hz, 0 dB, (at Max.)/3,3 k Ω

Headphone:  45 mW

Power Requirements:  100, 120, 120/220  - 240 or 240 V, 50/60 Hz

Power Consumption:  20 W max.

Dimensions (W x H x D):  500 x 130 x 350 mm (19-11/16" x 5-1/8" x 13-25/32")

Weight:  8,3 kg (18 lb 5 oz)

 

Tannoy Caernarvon loudspeakers

Time Compensated Dual Concentric Loudspeaker System

Superb stereo sound  has always been a feature of the Tannoy Dual Concentric Loudspeaker. Now the latest Time Compensated Dual Concentric System take another step closer to the real thing

Designed to bring the advantages of the new Dual Concentric System to smaller living areas, the Caernarvon uses a 254 mm (10") version of the Dual Concentric in a compact Floor standing enclosure. The Two-Speakers-in-One" Dual Concentric unit provides a single axis for the generation of both high and low frequency sounds. The complementary Time Compensated crossover produces a single sound source at one point on that axis.

The Caernarvon Dual Concentric therefore, eliminates time delay distortion created by more conventional loudspeakers. A much improved stereo image results, which - due to the wider dispersion of the Dual Concentric - is more accurate over a wider area.

 

 

Careful design and tuning of the Caernarvon cabinet ensures accurate reproduction of lower frequencies to give realistic generation of bass fundamentals. The overall dimensions, however, are small enough to obtain the best acoustic ; match with even quite compact rooms.

The Caernarvon is rigidly constructed from lock - mitred high density particle board, with cross-bracing and bitumen damping of internal panels to increase strength and reduce resonance.

All outer surfaces are veneered in real walnut, and the front baffle has an original cork finish, so that the Caernarvon looks as good with the grille removed. A specially woven Oatmeal cloth is used on the grille, which is removable in three parts.

Removing the centre section of the grille gives access to the high frequency response controls, which can shape the acoustic output of the Caernarvon to suit your particular room characteristics.

 

Specifications

Peak Power Handling:  350 W

Impedance:  8 Ω  nominal

Sensitivity:  90 dB (anechoic); 93 dB (domestic)

Frequency Response:  40 Hz - 20,000 Hz ±3 dB

Phase Response:  100 Hz - 8 kHz  ±20°

Time Compensation:  better than ±18 µsec. 100 Hz - 8 kHz

Dispersion:  90° horizontal and vertical (including angle at -6 dB points at 10 kHz)

Crossover Type:  Passive low loss, time compensated type 1022

Crossover Frequency:  1,200 Hz

Crossover Controls:

Energy Shelving :  ±6 dB over 1 kHz - 20 kHz

Roll-off Slope :  +3 dB to -6 dB per octave 5 kHz - 20 kHz

Drive Type: 254 mm (10") diameter, Dual Concentric, high compliance type 2558

Distortion;

Less than 10% , 3rd harmonic at half power 100 Hz - 20 kHz

Less than 0,5% , 3rd harmonic for 85 dB 70 Hz - 20 kHz

Less than 2% , 3rd harmonic for 100 dB 70 Hz - 20 kHz

Bass Loading:  Single Ducted Port

Cabinet Construction:  18 mm high density particle board with rigid cross-bracing and bitumen damping

Finish :  Real walnut veneer, Baffle finished in hand laid cork

Grille :  3-piece detachable, Oatmeal cloth on wood frames

Cabinet Internal Volume:  73 litres

Dimensions H x W x D):  775 x 366 x 365 mm

Weight:  27,5 kg